Most oxygen enters the ocean from

Gases dissolve most easily in

Ocean water temperature depends on the solar energy an area receives and the water’s

As deep ocean water becomes colder, it also becomes

Two factors that affect the salinity of ocean water are

Cold ocean water sinks and moves through the

Marine organisms help balance the chemistry of ocean water by removing nutrients and gases and

What is called the foundation of life in the ocean?

Nutrients in ocean water are stored

Which of the following live in the pelagic zone?

The ocean is the main source of the trace minerals

Most offshore oil and petroleum deposits are found

The layer in a body of water in which temperature drops with increased depth faster than it does in other layers is called the

In addition to increased use of toxic chemicals, what has reduced the ocean’s ability to renew itself?

In addition to limiting the use of leaded gasoline, what has the United States done to reduce ocean pollution?

Raising aquatic plants and animals for human consumption is

The process of removing salt from ocean water is called

The two principal gases dissolved in ocean water are

As the temperature changes, the ocean and atmosphere are continuously exchanging

Oceans are often referred to as a carbon sink. How many times more carbon is contained in the ocean than in the atmosphere?

Trace elements in the ocean are those minerals that are

By studying variations in color in the ocean, scientists can determine the presence of

Plankton are the foundation of life in the ocean because they

What is the name for the movement of deep, cold an nutrient-rich water to the surface?

The ocean zone that receives the most solar energy and is home to the most diverse ocean life forms is the

Volcanic eruptions, chemical weathering of rock on land, and chemical reactions between sea water and newly formed sea-floor rocks provide most of the raw elements that form this dissolved solid in the ocean.

The most valuable ocean resource, found beneath the ocean floor, is

A major obstacle to the advancement of aquaculture is

Explain the unique chemical composition of ocean water.

What are the main factors affecting the color of ocean water?

What might happen to populations of fish or dolphins if the number of plankton in an area of the ocean was reduced?

Many sea creatures that occupy the lower benthic zones of the ocean are sightless. Explain why this marine life, such as a variety of crabs, are not handicapped by their sightlessness.

You have been commissioned to set up an aquatic farm to supplement the diet of the local population. The rainfall in this area is erratic, and desalination is expensive, making traditional agriculture difficult. In which of the ocean zones would you locate your farm? Why? How might you increase the fertility of this aquaculture site? Explain your answer.

You are a scientist studying the health of phytoplankton. What weather conditions would be best for making your observations and recording accurate data? Explain your answer.